Lyme disease is a serious illness caused by the bite of an infected blacklegged tick. Ticks are small, ranging from the size of a poppy seed to a pea. The size of the tick varies depending on its age and whether it has fed recently. The bite is usually painless so you may not know that you have been bitten.
See your health care provider right away if:
- you find an attached tick on you
- experience symptoms of Lyme disease
- you feel unwell after outdoor activities where ticks could be present
Learn about the causes of the disease, how it is spread, and where it is found.
Main symptoms, what to look for and what to do if you become ill.
Learn what the risks are and who is most at risk.
Learn how the disease is diagnosed and how it is treated.
Learn how the disease can be prevented and how to reduce tick habitats near your home.
How the disease is monitored.
Learn information for Health professionals.
Causes of the disease, how it's spread, and where it's found.
What we are doing
- Action plan on Lyme disease Learn what the Government of Canada is doing on Lyme disease.
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